ASP. NET webUploader Upload large video file related web. config configuration

When uploading large files in webuploader, you must configure 1, otherwise, when requesting background handlers, you will request timeout. 404 appears!

<system.web>
<httpRuntime maxRequestLength="2040000" useFullyQualifiedRedirectUrl="true" executionTimeout="6000" minFreeThreads="8" minLocalRequestFreeThreads="4" appRequestQueueLimit="100" enableVersionHeader="true" />
 </system.web>
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="3000000000" />
</requestFiltering>
</security>
<staticContent>
<mimeMap fileExtension=".mp4" mimeType="video/mp4" />
</staticContent>
</system.webServer>